Machine-tool holder.



M. s. CUMNER L W. 'osTRA'NDBm MACHINE TOOL. HOLDER'. APPLICATION FILED NOV.1, 1906.

91 0,647. Patented Jali- 26, 1909,A

Unrrnn srarnis rarnnr enteren.v

MATTHEW S. CUMNER AND WILLIAM OSTRANDEH, OF VNEW YORK, N. Y., ASSIGNORS 'lO NESTOR MANUFACTURING COMPANY, OF NEW YORK.

YOLT(` N. Y.. A CORPORATION OF NEW MACHINE-TOOL HOLDER.

Specification of Letters Patent.

Patented Jan. 26, 1909.

Application filed November 1, 1906. Serial No. 341,537.

To all whom. it may concern.'

Be it known that we, Mnrrnnw S. (,UM- NER and WILLLUI Osrnaunnn, residing in the city of Greater New York, in the county and State of l\'ew York, have invented certain new and useful Improvements in Blachine-Tool Holders, of which the following is a specification.

Our invention in tool holders yrelates to that class adapted to be secured in a tool post of such machines as lathes, shapers,

planers, boring mills and other metal working machines ot' this character, and has for its principal obiect a means for readily adjusting the tool carried thereby to the required position as well as to provide a means for carrying tools having cylindrical Shanks as Well as a variety oll shanks dill'eringr in form.

A feature of our invention whereby we are enabled to carry out the object thereof, lies in the novel manner of providing a double recess along the substantially parallel and oppositely situated edges of the body ol'l the holder, and the provision of a terminal swinging clamp which may be adjusted to clamp a tool in either of the said oppositely situated parallel recesses at one terminal of the holder.

4Another feature of our invention conducive to facilitating the adjustment of the clamp in initially binding the tool in one of the said recesses, lies in the disposition ol' the novel key carried by the body of the holder.

These features of our invention are depicted in the 'drawings forming part of this specilicationand hereto attached, wherein,

Figure 1 is a side elevational view of our improved holder illustrating the clamping of r s'iiectively round and square tool shanks in their respective longitudinal recesses ot' the tool holder shank, and the manuel whereby the clamp is swung to engage a tool shank in either of said recesses; and Fig. 2 is an end elevational View thereof. l

In both figures, similar characters of reference designate like parts, wherein,

A constitutes the, tool shank provided with the substantially parallel and oppositcly situated recesses or channels A and A respectively l'or cach side. These, however, may be oll a variety in forni though in the illustrations we have shown but two forms. The recesses A2 are shown as V grooves while those as A appear as rectangular channels.

tool shank A is a fork B swung upon a stud B whereoy the fork B is adapted to move in the direction of the arrow, liig. 1, and assume a substantially vertical positlon over that of the original position indicated. The fork B is provided with a neck C which is inter-1 nally threaded to receive a clamp screw C. 'l he head t? of the clamp screw C is milled as illustrated, whereby the same may be manipulated and is provided with a perforation if* to receive the stein D of the key E. 'lhis latter is disposed in a cylindrical recess li' formed in the shank A of the tool holder and is secured thereto by a threaded connection it: as indicated by the dotted lines, Fig. 1.

lt will be noted by the illustrations that either recess of the tool holder may be employed to clamp the shank of a. tool F which in the instance. illustrated appears as a cylindrical shank, or a shank G of rectangular formation.

rlhe fragmentary sectional view of a tool post ll illustrates the manner of grip )ing the novel tool holder together with the slank of the tool in securing the whole in position in machines of the variety aforesaid.

Obviously, the novel tool holder may be readily adapted to clamp cylindrical, hexagonal or triangular forms ot' tool Shanks, and the angular' adjustment of tools having cylindrie-al shanks maY be readil* facilitated whereby the cutting edge of the tool may be set for more or less shear in accordance with the requirement ot' the work to be performed by the tool, and moreover with our novel tool holder we arc enabled to make use of mimparatively small pieces of material for the construction of particular boring tools and the like, and to construct these from uniform stock, thereby simplifying the. forging and consti-action oll tools for lathes, shapers, ilancrs and the like; while at the same time bv our invention we are enabled to more readily adjust their positions in the tool post.

\\'c arc aware that prior to our invention, a tool holder having a terminal clamp and a longitudinal groove has been in vogue, and

we thcrcl'or do not claim these features.

broadly as our invention, but

We. do claim as new and desire to secure. by Letters latcut olI the l'nited States1- l, A tool holder of the character described, comprising a bar provided with oppositcly situated longitudinal recesses, and

e terminal swinging clamp adapted to engege a. tool in either of the recesses.

2. A tool-holder comprising a bar adapted to hold a tool upon either of two opposite sides, and a. elempingmember pivoted to the ber and adapted to be swung over one end thereof to cooperate with either of said grooves.

3. A tool-holder, oomplrising a berend e. elem ing means pivote y mounted upon seid ar, and arranged to be swung so as to hold'eJ tool upon either of two opposite sides of the bar.

In testimony whereof, We have signed our names to this speeiiication, in the presence 15 of two subscribing witnesses.

Witnesses PHILIP K. STERN, J. WALLACE. CARTER. 

